/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsEditorOnlyExp/Public/EditMeshMaterialsTool.h
Check if, given the current scene state, a new instance of this builder's Tool can be created
true if a single mesh source can be found in the active selection
virtual bool CanBuildTool ( const [FToolBuilderState](API\Runtime\InteractiveToolsFramework\FToolBuilderState) & SceneState ) const